已知点
、
均在抛物线
上,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19cc6b9d87d76c6392e8842bf9a9e9b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6c51d0b1a90c2121b0dc8e20ad30af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b271ca8a17cb6f885ce375342869097.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2022-11-02 16:34:13
|
【知识点】 y=a(x-h)²+k的图象和性质解读
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【推荐1】如图,抛物线
与
交于点
,过点A作x轴的平行线.分别交两条抛物线于点B、C,则以下结论:①无论x取何值,
的值总是正数;②
;③当
时,
;④当
时,
;⑤
,其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/80bae790-c3ad-4368-969c-fa6b7cf850f3.png?resizew=203)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc328422aba0608f7868a26c5136b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48eba7a95e96cee389f6242ca7078c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9ece4ff94b2b1c4cc7ee25000f996f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c712829d60b4ea93966a5c68c24d677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701fe02f29387e1242f76c0e486ea8c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1113e9b568fb9ca3286582368e257a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05486718d0f498abca5c2c21912bb26d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a0c4afc5a640ab1e3817b9ff66ef8b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/80bae790-c3ad-4368-969c-fa6b7cf850f3.png?resizew=203)
A.①⑤ | B.①②⑤ | C.③④ | D.②③④ |
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【推荐2】若抛物线
的顶点在第二象限,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca45f303b6e056e14501e6129d49b559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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